JPH05317240A - Endoscope - Google Patents

Abstract

PURPOSE:To provide the endoscope which has a water spraying port to be mounted with a water spraying implement and can surely clean the inside of a water feed pipeline on the inner side of a nozzle by brushing with a cleaning brush inserted onto the water feed pipeline. CONSTITUTION:This endoscope is constituted by providing the water spraying port for spraying water by mounting the water spraying implement thereto in the part exclusive of an endoscope insertion part 1 so as to be communicated with the water feed pipeline 10 opened at the front end 2 of the insertion part 1 and providing a valve for blocking the flow from the front end 2 side of the insertion part to the water spraying port side between the water spraying port and the water feed pipeline 10. The valve is provided freely attachable and detachable to and from the water feed pipeline 10 so that the brush 100 for cleaning can be inserted into the water feed pipeline 10 from the part where the valve is removed from the water feed pipeline 10 when the valve is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope in which a water injection port for attaching a water injection device to inject water is provided so as to communicate with a water supply conduit opening at the tip of an insertion portion.

[0002]

2. Description of the Related Art Generally, at the tip of the insertion portion of an endoscope, a water supply nozzle is provided toward the observation window. When the observation window becomes dirty, water is pumped from the water supply nozzle by the pump pressure built in the light source device. To spray away the dirt.

However, for example, in the large intestine or the like, if dirt or the like adheres to the affected area which is the observation target, the affected area cannot be observed. Therefore, in order to strongly spray water or the like onto the observation target, a fluid ejection nozzle that opens in the direction of the observation visual field is provided and is commonly called a jet ejection nozzle.

In order to inject the washing water vigorously from such a jet injection nozzle, a manual water injection device such as a syringe can be connected to the water injection port of the water supply line communicating with the jet injection nozzle. Is becoming

Further, in the large intestine or the like, the dirt attached to the observation window may not be washed away by the jetting of the water sent by the pump pressure built in the light source device, so that the water is injected from the water injection nozzle to the water injection nozzle. There is also an endoscope in which a water inlet is provided in the operating portion so that the water can be injected (Japanese Utility Model Publication No. 55-55043, Japanese Patent Application Laid-Open No. 57-209035).
issue).

[0006]

It is not uncommon for clogging to occur due to backflow of sewage and the like in body cavities into the water supply conduit inside the jet injection nozzle or the water supply nozzle. In such a case, brushing the inside of the water supply line with a cleaning brush is a reliable cleaning method.

However, since the nozzle portion is formed to be very thin, the cleaning brush cannot be inserted into the water supply conduit from the nozzle side. Further, since a check valve is generally provided on the water injection port side and the cleaning brush cannot pass therethrough, the cleaning brush cannot be inserted into the water supply conduit from the water injection port side.

Therefore, a cleaning liquid is injected from the base end side of the water supply pipe to clean the inside of the tip of the water supply pipe.
It was not possible to completely clean the dirt and the like adhering to the inside of the water supply line, and there was a risk of causing inter-patient infection from the previous patient to the next patient.

Therefore, the present invention provides an endoscope having a water injection port for attaching a water injection device, in which a cleaning brush can be inserted into a water supply pipe line inside the nozzle to be surely cleaned by brushing. The purpose is to provide.

[0010]

In order to achieve the above-mentioned object, the endoscope of the present invention is provided with a water injection port for attaching a water injection device and performing water injection, which is opened at the tip of the insertion portion of the endoscope. A valve for blocking the flow from the tip side of the insertion part to the water injection port side is provided between the water injection port and the water supply line while being provided in a portion outside the insertion part so as to communicate with the water pipe. In the endoscope described above, the valve is detachably provided to the water supply conduit, and when the valve is removed from the water supply conduit, a cleaning brush is inserted into the water supply conduit from the removed part. It is characterized by being able to do so.

[0011]

Embodiments will be described with reference to the drawings. FIG. 2 shows an endoscope, and a distal end body 2 incorporating an objective optical system and the like is connected to the distal end of an insertion portion 1 formed of a flexible tube.

An air / water feeding operation button 4 and a suction operation button 5 are provided on the upper portion of the front surface of the operation portion 3 connected to the base end side of the insertion portion 1. A forceps insertion port 6 for inserting a treatment tool into a forceps channel (not shown) inserted in the insertion portion 1 is provided near the lower end of the operation portion 3 so as to project obliquely upward. .. In addition, a water injection port 7 for injecting water into the water supply tube 10 for injection that is inserted into the insertion portion 1 and opens to the tip end main body 2 is provided on the rear portion so as to project rearward,
A syringe 8 containing flush water or the like can be connected to the water injection port 7 via a connection tube 9.

FIG. 3 shows the forceps insertion port 6 and the water injection port 7 in the lower part of the operation section 3. Reference numeral 14 is a stainless steel pipe 14 connected to the proximal end of the forceps channel and connected to a branch block 15.

The branch block 15 is arranged inside the root of the projecting portion 12 formed on the case 11 that covers the lower portion of the operating portion 3. The branch block 15 includes a pipe 14
Forceps insertion conduit 16 that communicates straight with the suction conduit 1 and a suction conduit 1 that branches laterally from there and communicates with suction means (not shown).
9 and 9 are formed.

Reference numeral 21 denotes a tightening ring made of, for example, stainless steel, which is screwed into the branch block 15. By screwing the tightening ring 21 into the branch block 15 from above, the branch block 15 is pulled and shown in FIG. It is fixed in the state of being.

Reference numeral 23 denotes a nut 24 at the upper end of the protrusion 11.
Is a forceps insertion mouthpiece that is pressed and fixed by, and is formed of, for example, stainless steel. This forceps insertion base 23
A forceps plug 25 made of rubber or synthetic resin is detachably attached to the head of the.

Reference numeral 26 denotes a frame which is continuously formed from the operation portion 3, and at the lower end portion thereof, there is formed a receiving piece 28 for fixing the mouthpiece 1a of the insertion portion by tightening it with a nut 27. Then, the nut 29 screwed into the receiving plate 28 is
The two outer casings 11 and 13 are fixed in series by pressing them from the lower side to the upper side against the bottom portion of the operation portion 3.

The proximal end of the water supply tube 10 for injection is shown in FIG.
As also shown in FIG. 5, the bottom portion of the base 32, which is fixed to the frame 26 with screws, is communicatively connected via a connection pipe 33.

As shown in FIG. 3, the connecting pipe 33 is provided at the bottom of the base 32 so that a brush for cleaning the inside of the pipe, which will be described later, can be smoothly inserted into the water supply tube 10 for injection from the water injection port 7 side. 4 is obliquely connected to the instrument 14 so as not to interfere with the pipe 14 for inserting the treatment tool, as shown in FIG.
And parallel).

A tubular check valve receiving metal 34, the diameter of which changes in the course of several steps, is screwed and fixed to the base 32, and the O-ring 3 for sealing is provided in the clearance on the outer surface of the check valve receiving metal 34.
6, 37 are installed. The outer peripheral surface of the check valve receiving metal 34 is covered with an electrically insulating rubber coating 38.

A check valve unit 40 incorporating a check valve 41 is detachably screwed into the check valve receiving metal 34, and a water inlet 7 is formed in the check valve unit 40. In the check valve unit 40, as shown in FIG. 6, a spring for receiving a compression coil spring 44 for pressing the check valve 41 against the valve seat in a valve receiving body 43 having a tapered valve seat. The receiver 45 is screwed.

Further, an O-ring 46 for sealing a gap between the valve receiving main body 43 and the check valve receiving metal 34 is attached to an outer peripheral groove portion of the valve receiving main body 43.
An electrically insulating rubber coating 47 is coated.

Check valve 4 facing the valve seat of the valve receiving body 43
An O-ring 48 is attached to the umbrella-shaped portion 1. Therefore, as shown in FIGS. 3 and 4, the valve receiving body 43 is screwed into the check valve receiving metal 34 so that the check valve unit 4 is
In the state where 0 is attached, the O-ring 48 of the check valve 41 is pressed against the tapered valve seat of the valve receiving body 43 by the urging force of the compression coil spring 44, and the inner connecting pipe 3
The flow of the fluid from the 3 side to the outer water injection port 7 side is blocked.

On the contrary, when water or the like is injected from the water injection port 7 side with a strong pressure, the compression coil spring 44 contracts due to the pressure,
The check valve 41 separates from the valve seat, and water or the like is sent inside. Also, if the check valve 41 is mechanically pushed from the outside,
The check valve 41 remains open.

As shown in FIG. 2, a connection mouthpiece 51 at the tip of a connection tube 9 connected to a syringe 8 can be detachably connected to the water injection port 7 formed in the check valve unit 40. it can.

FIG. 5 shows the connection state, and FIG. 6 shows the connection release state. A C-shaped click spring 53 is attached to the insertion mouthpiece 52 fixed to the connection mouthpiece 51. The click spring 53 engages with the valve receiving body 43 of the check valve unit 40 to maintain the connected state.

The connection mouthpiece 51 has a valve receiving body 43.
An O-ring 54 for sealing the connecting portion with is attached, and the outer peripheral portion of the insertion cap 52 is covered with an electrically insulating rubber coating 55.

Then, as shown in FIG. 5, in a state where the connection mouthpiece 51 is connected to the check valve unit 40, the check valve 41 is pushed at the tip of the connection mouthpiece 51, and the injector 8 and the water supply for injection are injected. The state where the tube 10 and the tube 10 communicate with each other is maintained.
Therefore, if the cock 8a of the injector 8 is opened in this state, the wash water can be injected from the injector 8 into the jet water supply tube 10.

In the thus constructed endoscope, after the endoscopic examination is completed, as shown in FIG.
By removing the check valve unit 40 from 4, the in-pipe cleaning brush 100 is inserted into the water supply tube 10 for injection from the side of the check valve receiving metal 34 to the tip thereof, and the water supply tube 10 for injection is closed. Can be brushed.

Then, as shown in FIG. 7, if the rubber cap 53 having the jet nozzle 51 and the air / water nozzle 52 is removed from the tip end main body 2, the cleaning brush 10 is removed.
It is possible to insert 0 to the position where it projects from the tip of the water supply tube for injection 10 and to completely brush the inside of the water supply tube for injection over the entire length.

In FIG. 7, reference numerals 2a and 2b denote a metal portion and a plastic portion forming the tip end body 2, respectively.
5 is a circumferential groove for locking the rubber cap 53,
6 is a water supply tube.

FIG. 8 and FIG. 9 show a second embodiment of the present invention, which is a water supply tube for injection 1 as in the first embodiment.
No 0 is provided, and the inlet 7 is connected to the water supply tube 56 connected to the air / water supply operation button 4.

Also in this case, after the end of the endoscopic examination, the check valve unit 40 is removed from the check valve support 34,
The brush 100 for cleaning the inside of the conduit can be inserted into the water supply tube 56 up to the tip thereof from the side of the check valve receiving metal 34 to brush the inside of the water supply tube 56. As shown in FIG. It is possible to brush the entire length of the inside of the water supply conduit to the position where the tip of the brush 100 projects from the tip of the water supply tube 56.

[0034]

According to the endoscope of the present invention, since the valve provided between the water inlet and the water supply pipe is detachably provided, the valve can be removed after the end of the endoscopic examination. It has an excellent effect that the cleaning brush can be inserted into the water supply pipe line from the removed portion to surely clean the water supply pipe line by brushing.

[Brief description of drawings]

FIG. 1 is an overall schematic view showing a preparation state for cleaning after using the endoscope of a first embodiment.

FIG. 2 is an overall schematic view of the endoscope of the first embodiment.

FIG. 3 is a partial side sectional view of the first embodiment.

FIG. 4 is a partial plan sectional view of the first embodiment.

FIG. 5 is a partial side cross-sectional view of the state where the syringe of the first embodiment is connected.

FIG. 6 is a partial side sectional view of the syringe of the first embodiment in a disconnected state.

FIG. 7 is a side sectional view of a distal end portion of the endoscope of the first embodiment.

FIG. 8 is a partial side sectional view of the second embodiment.

FIG. 9 is a side sectional view of a distal end portion of the endoscope of the second embodiment.

[Explanation of symbols]

 1 Insertion Part 2 Insertion Part Tip 7 Water Injection Port 8 Syringe 10 Water Injection Tube 40 Check Valve Unit 41 Check Valve 100 Cleaning Brush

Claims (1)

[Claims] 1. A water injection port for attaching a water injection device to perform water injection is provided at a portion outside the insertion portion so as to communicate with a water supply conduit opening at the tip of the insertion portion of the endoscope, and the insertion portion is also provided. In an endoscope in which a valve for blocking the flow from the tip side to the water injection port side is provided between the water injection port and the water supply pipe line, the valve is detachably provided to the water supply pipe line. Then, when the valve is removed from the water supply conduit, the cleaning brush can be inserted into the water supply conduit from the removed part.